Without DAC, more frequent dosing is needed to maintain steady effects
Most common causes of the discolouration include: Medications amino-salicyclic acid derivatives mesalazine/paraaminosalycylic acid/sulfasalazine doxorubicin , hydroxocobalamin , ibuprofen, phenothiazines, phenolphthalein, propofol , rifampicin/rifampin Dietary ingestants beeturia , rhubarb, blackberries, food dyes Metabolic abnormalities porphyria , urate crystals Hydroxocobalamin Early features of cyanide poisoning include nausea, vomiting, headache, dyspnoea, tachypnoea, hypertension, tachycardia, collapse and seizures
However, older adults may have a more challenging time absorbing B12 from their diet, so it may be necessary to supplement this vitamin
Note that the contents of a vial expire 30 days after opening